Tilting spreading bucket



July 21, 1925.

E. H. LICHTENBERG TILTING SPREADING BUCKET Filed 001;. 31, 1923 Patented July 21, 1925.

1 UNITED TA ES ENT OFFICE.-

E'aIon H. mcn'rnmmne, on mwnUxnn, I wrsconsm,

COMPANY, OF WISCONSIN, A CORPORATION.

'rILrrNe isrnmnrne BUCKET.

Applicatlen filedOctober e1, 1923. Serial no. 671,881.

machines of the type presented in my LetterslPatent No. 1,411,217 issued to me March 28,1922. I

The object of the invention hasbeen to adapt the spreading idea or feature .of my said patented invention to a tilting bucket construction. In other words,inmypresent type of bucketIutilize a turnover receptacle closed at its bottom and equipped with a valve or door at its upper portion. I utilize furthermore automatic contrivances whereby as the bucket or receptacledumps by a tilting movement the said door or valve will be opened the required amount to feed from the bucket the mixed aggregates or plastic concrete. The feeding action is such that the plastic materials flow through the door or valve of the bucket in a layer of predetermined thickness controlled by the degree of opening movement ofsaid door, and are, therefore, laid down upon the subgrade in such predetermined thickness so as to avoid the necessity of the considerable. manual spreading that would otherwise be entailed.

A further object of the invention has been to design a tilting bucket construction wherein the bucket and its door controlling means are susceptible of being controlled in operation by trip mechanism very similar to that of my previous Letters Patent, though having a much different action in regard to its controlling effect.

With the foregoing and other objects in.

view reference is to be had to the accompanying drawings for a full understanding of my invention and the advantages thereof, and in the said drawings:

Figure 1 is a front view of the bucket and its supporting means, showing a preferred embodiment of the improvements hereof,

Figure 2 is a side elevation of the same. It is assumed that one conversant with the art of concrete paving machines of the Koehring type paved. There 1915. This tri of my Letters Patent will customary operation of, such machlnesyjiI, therefore, only present herein understand ---assrenon TOY, xonntnmc the particular features of the bucket construction that have been designed-by me for use in conjunction with the b spreading. mechanism of such machines.

In the'i'drawings' A designates the boom of my; machine'and B,the carriage for traversing said boom back and forth in the opera I tion of distributing concrete from the concrete mixer upon the subgrade that is being ismounted upon the carriage or trolley B, the wheels 1 of which travel along the. channels of the boom A, certain trip mechanism such as 'presented in my patent hereinbefore mentioned and also in my Patent No. 1,141,470 granted June 1,

mechanism involves a tripping dog or ger '2 shiftable upon the carriage B to actuate a knock-over arm 3 to move the latter from the full line position of Figure 2 to the dotted line position illustrated in said figure. Thisaction takes place in the well known manner upon reversing the cable by which the carriage B is moved back and forth along the boom. Connected with the knock-over arm 3 is a link 4, the lower end of which is curved to extend beneath the rock shaft 5 on which the arm 3 is fixed.

7 The carriage B supports the tilting bucket generally triangular, and supplied with an in-flow opening at its right upper portion, as shown generally at 8, and an out-flow opening at its left upper portion. The outflow opening is adapted to be opened and closed y means of a door or valve9 which slides by means of pin and slot connections 10 upon the uppereft closin end portion 11 of the bucket. The bucket is supported by means of hangers 12, the lower ends of which are equipped with journals'to receive trunnions 13 overstanding from opposite ends of the bucket. The upper ends of the hangers 12 are ri 'dly attac ed to the carriage B in any su stantial manner. At its lower endthe curved link 4 is pivotally connected at 14 with a bucket tiltlng or release links 15, the upper ends of which links are attached to a cross bar 16 adaptedto slide ertically relatively to the carriage B 00m and which is of a somewhat unique shape,

through the provision of slots in the lower extremities of the sides of said carriage, as shown best at 17 in Figure 1. Normally the mounting of the bucket 7 is such that 1t tends to tilt to a leftward dumping posltlon, as shown by dotted lines in Figure 2 because of its connection with the hangers 12 in a state of unstable equilibrium. That 1s to say that the larger part.of the weight of the bucket and its contents is earned a little to'the left of the pivot points 13. The dumping action of the bucket 8 is of course normally prevented owlng to the pos1t1on of the arm 3 in the full line adjustment shown in Figure 2. When the arm 3 is tripped or knocked off, however, and shiftsdownward and rightwards the link 4 lowers and the links 15 are permitted to move downwards, thereby resulting in the tiltlng of the bucket 7 in a self-evident manner.

Now it is desirable that as the bucket 7 is tilted'to dump. in the manner shown in dotted lines in Fig. 2, the door 9 shall open automatically and deliver through the opening controlled thereby ,a stream of plastic concrete in a layer like condition, such that it will be deposited on the subgrade in a-' flat layer of predetermined thickness.

To the above end I connect with the door 9 bell crank levers 18 that have an interlocking connection with opposite ends of the door. The said levers are attached to actuating rods 19 which pass through pivoted keepers 20 on the opposite lo'wer portions of the hangers 12. On their lower or right hand ends the rods 19 carry adjustable stops 21 and the action of the parts will be understood now from a full description of the complete operation. Assuming that the carriage B is traveling outwards on the boom A and it is desired to distribute the contents of the bucket 7 to a subgrade, the operator of the machine will reverse the cable attached to the carriage B so as to discontinue the outward traverse of the bucket 7 and start it on its inward traverse. The said reversal of the cable causes an actuation of the dog 2 in the well known manner resulting in knocking ofi'the arm 3 and dropping of the link 4. The foregoing results in a lowering movement of the links 15 which are theretofore holding up the bucket 7 in its upright position, shown in Figure 2.

The lowering of the links 15 permits the bucket 7 to tilt laterally and downwardly in the manner shown in dotted lines in Figure 2, and at a certain point in this downward tilting movement of the bucket the stop 21 contacts with the keeper 20 resulting in a pull on the bell crank 18 which forces the door 9 into an open position. The bucket is now starting back on its traversing movement with the tilting adjustment thereof obtained and the contents thereof streaming out through the now open door.

Of course after a certain amount of movement of the bucket inwardly on the boom effected through the reversal of the cable aforesaid, the bucket will become empty and by the time it reaches the inner ,end of the boom a cam' 22 will be struck by the restoring arm 23 attached to the rock shaft 5, and this results in a raising of the arm 3, the links 4. and the links 15, thus pulling the bucket 7 upwards to its normal nontilting and non-discharging position. At the same time as the bucket 7 resumes its upright position, the rods 19 slide downwardly through the keepers 20 and other stops 24 on said rods impinge the keepers 20 and cause a rocking of the bell crank levers 18, such that thedoor 9 is forcibly closed. By adjustment of the stops 21 upon the rods 19 the degree of. opening of the door 9 may be predeterminedly regulated, and by such operation the thickness of the layer of plastic aggregates caused to be flowed out of the bucket on tilting thereof may be correspondingly controlled' The actuation of the ,arm 23 to restore the bucket 7 to its upright position involves a corresponding lifting of the arm 3, the link 4 and the bar 16 with the links 15. The foregoing resultsin a positive normalizing of the bucket 7 in an obvious manner. The extent of the dumping or tilting movement of the bucket 7 may be somewhat regulated through the provision of an adjustable stop 25 on the carriage B, with which stop the restoring arm 23 is adapted to engage to thereby limitthe extent of downward movement of the parts 4, 15 and 16. v

Of course it will be understood that I do not have to adhere to the exact shape of the bucket 7 as presented, and the several details of my mechanism may be changed in material aspects so as to produce the same results as are produced in the construction and cooperation of the parts previously presented.

It is notable that by the use of the tilting type of bucket I am enabled to preserve a complete mixture of aggregates delivered to the bucketin substantially the condition in which they are received from the mixer. In other words, water is not permitted to escape from the bucket along with a certain proportion of cement that necessarily passes off with the water incident to the leakage of the aggregates by the dumping buckets, such as shown in my patents aforesaid.

Having thus described my inventionwhat I claim as new and desire to secure by Lettens Patent of the United States is,

1. In a boom and bucket distributor for concrete pavers, in combination, -a boom, a carriage to traverse the boom, a bucket tiltably mounted upon the carriage, trip mechanism for causing tilting action of the bucket, and a door on the bucket openable on tilting of said bucket to cause delivery of concrete aggregates from the bucket stream of predetermined thickness.

2. In boom and bucket mechanism for concrete pavers, in combination, a boom, a carriage to traverse said boom, a. bucket tiltably mounted on said carriage, means on said'carriage operable to release the bucket for causing a tilting movementof the latter, and a door'opening mechanism on the bucket operable to controllably feed the materials from the bucket when the latter assumes its tilted position. I

3. In boom and bucket mechanism for concrete pavers, in combination, a boom, a

carriage to traverse said boom, a bucket tiltably mounted on said carriage, means on said carriage o rable to release the bucket for causing a ti tin movement of the latter, a door for said budlket disposed at its'upper portion, and means for automatically opening said door as an incident to its tilting movement.

4. In boom and bucket mechanism for concrete pavers, in combination, a boom, a carriage to traverse said boom, a bucket tiltably mounted on said carriage, supporting means for the bucket, means on said carriage operable to release the bucketfor causing a tilting movement of the latter, a door for said bucket disposed at its upper portion, means for automatically opening said door as an incident to its tilting movementand comprising door op-' erating members and actuating parts for said door operating members cooperating with the supporting means for the bucket to cause opening and closing of said door.

5. In boom and bucket mechanism of the class described in combination, a boom, a-

carriage to traverse said boom, hangers su ported by said carriage, a bucket tiltab y mounted on said hangers and trip mechanism on the carriage operable to release the bucket to permit it to tilt, and also operable to restore the bucket to an upright nondischarging position.

6. In boom and bucket mechanism of the class described, in combination, a boom, a carriage to traverse said boom, hangers su ported by said carriage, a bucket tiltab y mounted on said hangers and trip mechanism on the carriage operable to release the bucket to permit it to tilt, and also operable to restore the bucket to an upright non-' discharging position, together with a sliding door on said bucket .and mechanism for eifecting a sliding movement of said door operable automatically incident to the tilting movement of the bucket.

7. In combination a boom, a bucket to traverse the boom, a carriage on said boom supporting said bucket, tripping means for causing the bucket to tilt for dumping action, and adoor for the bucket automati- I I -cally operable as an .incident to its tilting movement.

' 8. In combination, a boom, a carriage adapted to traverse said boom, a bucket suspended from said carriage and adapted for tilting movement, trip mechanism on the carriage connected .with the bucket to normally old it in an upright non-discharging position, a discharge controlling door carried by the bucket and automatic means for causing a movement of said door incident to tilting movement of the bucket and also incident to a restoring movement of said bucket after use thereof.

9. In combination, a boom, a carriage mounted to traverse the same, a bucket, hangers carried by 'said carriage and connected with the bucket, trip mechanism on the carriage connected with the bucket to cause release and dumping action of the lat' ter, a door-on the bucket, and, means connecting said door with the supporting means of the bucket whereby as the bucket tilts. the door automatically open.

-10. In combination, a boom, a carriage mounted to traverse the same, a bucket, hangers carried by said carriage. and connected with the bucket, trip mechanism on, the carriage connected with the bucket to cause release and dumping action of the latter, a door on the bucket, means connecting said door with the supporting means of the bucket whereby as the bucket tilts the door automatically opens and later as the bucket is restored to normal position the door is automatically closedf 11. In combination, a boom, a carriage to traverse the boom, hangers on said carnage,

a bucket pivotally connected with said hangers so as to tilt from an upright receivlng position to a downward concrete spreading discharging position, a'door for said bucket and operative connections intermediate said door and the hangers for causing an opening movement of the door automatically as the bucket tilts downwards, and

for causing a closing movement of the door as the bucket is restored to a normal upright nondischarging position.

12. In combination, a boom, a carriage to traverse the boom, a bucket mounted 'on said carriage and arranged to tilt for discharging its contents on a subgrade, said bucket comprising a door at its upper left-hand portion and a receiving opening at its upper .12 right-hand portion, with operative connections leading from said door to the bucket supporting means, whereby to effect automat1c opening of the door. as the bucket tilts downwards and automatic closing of said door-as said bucket is restored to an upwardly normal osition.

13. In combination, a boom, a. carria e to traverse the boom, a bucket supported by said carriage and movable thereby for conveying plastic aggregates to a subgrade, said bucket being adapted to tilt for its discharging operation, and a door carried by the bucket and adapted to restrict the flow of the plastic aggregates therefrom so as to cause the same to pass from the bucket in a layer of predetermined thickness, and thu laid down on the subgrade.

14. In a boom and bucket attachment for concrete mixers, in combination a bucket movable inwardly and outwardly along said boom for carryingplastic-aggregates to a subgrade, said'bucket having a discharge opening at its upper portion, means for effecting a dumping action of said bucket at a predetermined point in its movement on the boom, and for forcibly restoring the bucketto a normal non-discharging position, and a door carried by the bucket to restrict the flow of plastic aggregates therefrom, the bucket being so arranged that when it tilts its opening controlled by said door,

- will be relatively close to the ground so that the aggregates will flow to the subgrade in a layer of thickness determined by the action of the door. J

15. In a boom and bucket attachment for concrete mixers, in combination a boom and the bucket being so arranged that when tilted its discharge opening will be relatively close to the ground so that the plastic aggregates ma be laid down in a layerlike form by restricted flowing action substantially as described.

16. In a boom and bucket distributor for concrete pavers, in combination, a boom, a carriage to traverse the boom, a bucket tiltably mounted upon the carriage, cable control trip mechanism for tilting the bucket, said bucket having a controllable discharge for retarding the feeding of materials therefrom in a stream of predetermined thickness on tilting of the bucket underthe action of the cable control means.

In testimony whereof I affix my signature.

ERICI-I H. LICHTENBERG. 

